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Management and Diseases of Waterfowl · •Identify common backyard waterfowl breeds. •Understand basic husbandry/housing/nutrition as it relates to waterfowl. •Be able to create

Jul 18, 2020

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Page 1: Management and Diseases of Waterfowl · •Identify common backyard waterfowl breeds. •Understand basic husbandry/housing/nutrition as it relates to waterfowl. •Be able to create

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Management and Diseases of Waterfowl

OSU Advanced Poultry Medicine Workshop

6/20/19

Ohio ADDL

Dr. Geoffrey Lossie  DVM, MS, DACPV

[email protected] https://images.homedepot‐static.com/productImages/d31251a7‐fcd6‐4614‐8608‐a27d38496abd/svn/white‐roommates‐wall‐decals‐rmk1512gm‐64_1000.jp

• Identify common backyard waterfowl breeds.

• Understand basic husbandry/housing/nutrition as it relates to waterfowl.

• Be able to create “rough” differential list for most common medical conditions in backyard waterfowl.

• Understand treatment and management of common medical conditions seen in waterfowl.

Are these waterfowl?

Waterfowl: Order anseriformes

Common waterfowl: ducks, geese, swans

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Common Ducks

• Types of domestic duck that originated from the Mallard.

• Different breeds and varieties are capable of mating and producing fertile offspring.

• Frequently seen breeds: Pekin, Asylesbury, Rouen, Call, Indian Runner, Khaki Campbell, and Cayuga 

Peking duck

https://www.californiahatchery.com/Pekin‐Ducklings_p_8.html

Rouen duck

https://www.mypetchicken.com/catalog/Waterfowl/Ducklings‐Rouen‐p2587.aspx

Indian Runner Duck

https://www.efowl.com/shop/fawn‐and‐white‐indian‐runner‐ducks‐metzer/

Cayuga Duck

https://www.purelypoultry.com/cayuga‐ducklings‐p‐616.html

https://www.tumblr.com/tagged/call‐ducks

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Muscovy Ducks

https://www.allaboutbirds.org/guide/Muscovy_Duck/species‐compare/

Sterile Hybrids

• Hybrids of Muscovy ducks and other breeds are sterile.

• Various mixes and combos have been used, with some common ones being: Mule ducks, Hinny, and Moulard

• Lots of color varieties

https://www.flickr.com/photos/satsuma7/927154422

Common Breeds of Backyard Geese

Toulouese

Embden

https://www.cacklehatchery.com/toulouse‐geese‐not‐sexed.html

https://www.purelypoultry.com/embden‐geese‐p‐550.html

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American Buff Goose

Pilgrim Goose

https://www.mypetchicken.com/catalog/Waterfowl/Goslings‐Buff‐p2596.aspx

https://poultrykeeper.com/goose‐breeds/pilgrim‐geese/

Common Breeds of Swan

Mute Swan

Australian Black Swan

https://mucc.org/mute‐swans‐threat‐wetlands‐wildlife/

https://www.australiangeographic.com.au/blogs/wild‐journey/2016/07/black‐swan‐the‐impossible‐bird/

Anatomic and Physiologic Differences/Traits

https://www.elsevier.com/connect/how‐the‐bird‐lost‐its‐penis

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https://www.reddit.com/r/askscience/comments/8tzhmt/how_do_birds_thermoregulate/

Housing Requirements

https://www.vet.cornell.edu/animal‐health‐diagnostic‐center/programs/avian‐health/housing‐management

Coop Design

• Most coops built for chickens, should also work well for ducks and other waterfowl.

• Need make sure to have enough space, and coop is large enough for taller breeds of waterfowl.

• DO NOT KEEP POOLS IN COOP AREA.

• Ensure adequate litter.

http://thepoultryguide.com/10‐duck‐house‐plans‐you‐can‐build‐this‐weekend/

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Outdoor run/Access Area

• DUCKS LOVE WATER: Drink significantly more than turkeys or chickens, and hence produce more liquid waste.

• To keep up with the waste, good coop and outdoor access maintenance is required.

• Sand is a good option for outdoor run areas as it drains well and can be replaced easily when overly soiled.

• Waterfowl have more sensitive feet than turkeys or chickens.

• Avoid the following materials for the outdoor run: Pea gravel, wood chips, or straw***.

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To Pool or not to Pool…….

https://poolcareguy.com/how‐to‐keep‐ducks‐out‐of‐pool/

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Appropriate Litter for Waterfowl

• Litter, regardless of type, should be of appropriate depth. 

• Ideal: Minimum of around 3 inches

• Pine shavings easiest to source and the most commonly used.

• Other possibilities include: ground corn cobs, chopped hay, and rice and nut hulls.

• Due to messy nature of waterfowl: frequent replacement litter around waterers and feeders.

Male:Female Ratios and Aggression

• Males generally do well when kept with ONLY other MALES.

• Females generally do well when kept with ONLY other FEMALES.

• Mixing the sexes………now you may have issues.

• Some ducks will form mated pairs with no signs of aggression.

• General rule for keeping males and females is to run a MINIMUM of 3 hens to every drake.

Appropriate Pen‐mates?

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Waterfowl Nutrition

• Always recommend a complete and balanced crumble or pellet.

• Young ducklings: First 3 weeks, diet should be around 18‐20% protein.• Young ducks: 4th‐13th week, diet should be around 14% protein.• Laying ducks: Should be placed on layer diet after 14 weeks. Layer diet should be 16‐17% protein and contain 3.5‐4.5% calcium.

• Male ducks can typically consume a layer diet, without risk of renal issues. They should however be kept away from oyster shells.

• Oyster shells: should be offered to laying hens to maintain calcium levels.

• Fresh/CLEAN/drinking water daily

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Common Diseases of Backyard Waterfowl

https://www.tyrantfarms.com/how‐to‐build‐a‐backyard‐pond‐with‐diy‐biofilter/

Aspergillosis

• Typically caused by Apsergillus fumigatus

• Young birds more susceptible

• Typical signs: Respiratory predominate (dyspnea, open mouth breathing), followed by CNS signs (non‐specific)

• Typical lesions: • Lungs: White to yellow plaques and nodules (1mm‐several cm diameter)

• Air ways: May see mycelial fungal plaques

• Brain: Yellow mycotic nodules

• Ocular lesions: Rare

https://thepoultrysite.com/publications/diseases‐of‐poultry/212/aspergillosis

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Aspergillus cont.

• Outbreaks divided into hatchery and non‐hatchery origin.

• Imperative to keep good brooder conditions: avoid wet litter.

• Dx: Straight forward: fungal culture of suspected lesions and histopath.

• Tx: None. Post outbreak make sure to disinfect all pens and bird areas as much as possible with a fungicide.

• Prevention: Incubator maintenance/cleanliness is key for backyard breeders.

Riemerella anatipestifer

• AKA: New duck disease, Infectious serositis, and Pasteurella anatipestifer.

• Gram negative‐non sporulating rod similar to P. multocida.

• Epidemiology poorly understood. Believed to be transferred via respiratory route and possibly through wounds to the feet.

• Typical age affected: 1‐7 weeks• Clinical Signs: Ocular and nasal discharge, coughing, sneezing, tremors of head and neck, and incoordination.

• Gross lesions: Fibrinous pericarditis and perihepatitis, splenomegaly, and less commonly pneumonia. 

• Flock Mortality: Range between 2‐50%

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5095637/

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https://www.backyardchickens.com/threads/pekin‐duck‐has‐runny‐wet‐foamy‐eyes‐sinus‐infection.691108/

Reimerella cont.

• Dx: Based on clinical and gross findings in conjunction with bacterial isolation (blood agar or chocolate agar)

• Differentials: E.coli (colibacillosis), salmonellosis, and chlamydiosis.

• Prevention: Biosecurity is key! Bacterin and live vaccines are available (not recommended unless dealing with commercial production)

• Treatment: Should be based off antibiotic sensitivity tests. Classic drugs used include: penicillin, streptomycin, and sulfa’s.

Pasteurella multocida

• Gram negative ***Bi‐Polar Staining*** rod.

• Affects numerous species of poultry (including waterfowl).

• Two general forms• Acute Septicemic form (most common)• Chronic form

• Geese are highly susceptible• Can see extensive losses in wild waterfowl• Recovered birds=carriers• Various mammals act as vectors: MICE, RATS, Cats, dogs, swine, raccoons, possums, and even pastured ruminants.

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Pasteurella cont.

• Clinical signs: may be absent prior to death.• First clinical sign may be large numbers of dead birds.

• May see: depression, anorexia, diarrhea, and increased respiratory rates.

• Gross Lesions: Acute form• Petechial and ecchymotic hemorrhages subepicardial and subserosal locations.

• Increased peritoneal or pericardial fluid

• Multifocal‐necrotic foci in the liver and spleen (subacute)

• Dx: Bacteriology supported by histopath +/‐ PCR.

• Impression smear affected organs: bipolar staining

• Differentials: E. coli, Salmonella sp., ORT, Erysipelothrix rhusiopathiae

https://www.merckvetmanual.com/poultry/fowl‐cholera/overview‐of‐fowl‐cholera

Pasteurella cont.

• PREVENTION IS KEY• GOOD RODENT/VARMINT CONTROL• All in‐All out• Eliminate Wild Birds• Remove other carriers (dogs, cats, livestock)• Maintain closed waterers and keep up on feeder/waterer sanitation (contaminated feed and water important source of infection)

• Vaccines………..maybe……

• Treatment: Antibiotics will lower mortality, but it will likely resume once treatment is discontinued.

• Elimination: Requires depop, stringent cleaning and disinfection, and removal of potential sources (rodents)

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Duck Viral Enteritis

• AKA: Duck plague

• Acute, highly contagious viral infection of ducks, geese, and swans!

• Herpes virus: Inapparent carriers important in transmission

• Issue in both domestic and wild waterfowl

• Spread direct or indirect contact with a contaminated environment (water)

• “Adult” birds die more readily than younger birds

DVE cont.

• Clinical signs vary by age affected

• Adults: Sudden death, weakness, extreme thirst, soiled bloody vents, prolapsed phallus (males), photophobia, nasal discharge, marked drop in egg production.

• Ducklings: Dehydration, weight loss, cyanotic bills, blood stained vents.

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Duck Viral Enteritis

• BREED PREDISPOSITION: Muscovy ducks and Green‐winged Teal

• Avoid contact with wild waterfowl

• Post infectiondepop, dead bird removal, sanitation, and disinfection

• Vaccines are available (commercial production)

Duck Virus Hepatitis

https://thepoultrysite.com/articles/major‐viral‐diseases‐of‐waterfowl‐and‐their‐control

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Duck Viral Hepatitis

• Highly contagious viral disease• Multiple “types”

• Most common in US is Duck Hepatitis A Virus (DHAV‐1)

• Rapid Incubation Period (12‐48 hrs)• Ducklings: lethargic, incoordinated, spasmodic paddling, opisthotonos, and death

• Adult ducks can be infected, but deaths not seen post 7 weeks of age• No treatment

• Vaccines available• Good biosecurity (avoid wild waterfowl, rats may act as virus reservoir)

Sarcocystis

https://huntfish.mdc.mo.gov/hunting‐trapping/hunting‐diseases/sarcocystis

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Botulism aka Limberneck

https://www.northeastwildlife.org/disease/botulism

Honorable Mentions

• Prolapsed vent or phallus

• Egg bound

• Egg yolk peritonitis

• Decreased egg production

• Water belly

• Lead poisoning

• Organophosphates

• Aflatoxins

Thank You!  Questions????